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Diffstat (limited to 'drivers/misc/mic/card/mic_x100.c')
-rw-r--r--drivers/misc/mic/card/mic_x100.c347
1 files changed, 0 insertions, 347 deletions
diff --git a/drivers/misc/mic/card/mic_x100.c b/drivers/misc/mic/card/mic_x100.c
deleted file mode 100644
index c8bff2916d3d..000000000000
--- a/drivers/misc/mic/card/mic_x100.c
+++ /dev/null
@@ -1,347 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Intel MIC Platform Software Stack (MPSS)
- *
- * Copyright(c) 2013 Intel Corporation.
- *
- * Disclaimer: The codes contained in these modules may be specific to
- * the Intel Software Development Platform codenamed: Knights Ferry, and
- * the Intel product codenamed: Knights Corner, and are not backward
- * compatible with other Intel products. Additionally, Intel will NOT
- * support the codes or instruction set in future products.
- *
- * Intel MIC Card driver.
- */
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/platform_device.h>
-
-#include "../common/mic_dev.h"
-#include "mic_device.h"
-#include "mic_x100.h"
-
-static const char mic_driver_name[] = "mic";
-
-static struct mic_driver g_drv;
-
-/**
- * mic_read_spad - read from the scratchpad register
- * @mdev: pointer to mic_device instance
- * @idx: index to scratchpad register, 0 based
- *
- * This function allows reading of the 32bit scratchpad register.
- *
- * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
- */
-u32 mic_read_spad(struct mic_device *mdev, unsigned int idx)
-{
- return mic_mmio_read(&mdev->mmio,
- MIC_X100_SBOX_BASE_ADDRESS +
- MIC_X100_SBOX_SPAD0 + idx * 4);
-}
-
-/**
- * __mic_send_intr - Send interrupt to Host.
- * @mdev: pointer to mic_device instance
- * @doorbell: Doorbell number.
- */
-void mic_send_intr(struct mic_device *mdev, int doorbell)
-{
- struct mic_mw *mw = &mdev->mmio;
-
- if (doorbell > MIC_X100_MAX_DOORBELL_IDX)
- return;
- /* Ensure that the interrupt is ordered w.r.t previous stores. */
- wmb();
- mic_mmio_write(mw, MIC_X100_SBOX_SDBIC0_DBREQ_BIT,
- MIC_X100_SBOX_BASE_ADDRESS +
- (MIC_X100_SBOX_SDBIC0 + (4 * doorbell)));
-}
-
-/*
- * mic_x100_send_sbox_intr - Send an MIC_X100_SBOX interrupt to MIC.
- */
-static void mic_x100_send_sbox_intr(struct mic_mw *mw, int doorbell)
-{
- u64 apic_icr_offset = MIC_X100_SBOX_APICICR0 + doorbell * 8;
- u32 apicicr_low = mic_mmio_read(mw, MIC_X100_SBOX_BASE_ADDRESS +
- apic_icr_offset);
-
- /* for MIC we need to make sure we "hit" the send_icr bit (13) */
- apicicr_low = (apicicr_low | (1 << 13));
- /*
- * Ensure that the interrupt is ordered w.r.t. previous stores
- * to main memory. Fence instructions are not implemented in X100
- * since execution is in order but a compiler barrier is still
- * required.
- */
- wmb();
- mic_mmio_write(mw, apicicr_low,
- MIC_X100_SBOX_BASE_ADDRESS + apic_icr_offset);
-}
-
-static void mic_x100_send_rdmasr_intr(struct mic_mw *mw, int doorbell)
-{
- int rdmasr_offset = MIC_X100_SBOX_RDMASR0 + (doorbell << 2);
- /*
- * Ensure that the interrupt is ordered w.r.t. previous stores
- * to main memory. Fence instructions are not implemented in X100
- * since execution is in order but a compiler barrier is still
- * required.
- */
- wmb();
- mic_mmio_write(mw, 0, MIC_X100_SBOX_BASE_ADDRESS + rdmasr_offset);
-}
-
-/**
- * mic_ack_interrupt - Device specific interrupt handling.
- * @mdev: pointer to mic_device instance
- *
- * Returns: bitmask of doorbell events triggered.
- */
-u32 mic_ack_interrupt(struct mic_device *mdev)
-{
- return 0;
-}
-
-static inline int mic_get_sbox_irq(int db)
-{
- return MIC_X100_IRQ_BASE + db;
-}
-
-static inline int mic_get_rdmasr_irq(int index)
-{
- return MIC_X100_RDMASR_IRQ_BASE + index;
-}
-
-void mic_send_p2p_intr(int db, struct mic_mw *mw)
-{
- int rdmasr_index;
-
- if (db < MIC_X100_NUM_SBOX_IRQ) {
- mic_x100_send_sbox_intr(mw, db);
- } else {
- rdmasr_index = db - MIC_X100_NUM_SBOX_IRQ;
- mic_x100_send_rdmasr_intr(mw, rdmasr_index);
- }
-}
-
-/**
- * mic_hw_intr_init - Initialize h/w specific interrupt
- * information.
- * @mdrv: pointer to mic_driver
- */
-void mic_hw_intr_init(struct mic_driver *mdrv)
-{
- mdrv->intr_info.num_intr = MIC_X100_NUM_SBOX_IRQ +
- MIC_X100_NUM_RDMASR_IRQ;
-}
-
-/**
- * mic_db_to_irq - Retrieve irq number corresponding to a doorbell.
- * @mdrv: pointer to mic_driver
- * @db: The doorbell obtained for which the irq is needed. Doorbell
- * may correspond to an sbox doorbell or an rdmasr index.
- *
- * Returns the irq corresponding to the doorbell.
- */
-int mic_db_to_irq(struct mic_driver *mdrv, int db)
-{
- int rdmasr_index;
-
- /*
- * The total number of doorbell interrupts on the card are 16. Indices
- * 0-8 falls in the SBOX category and 8-15 fall in the RDMASR category.
- */
- if (db < MIC_X100_NUM_SBOX_IRQ) {
- return mic_get_sbox_irq(db);
- } else {
- rdmasr_index = db - MIC_X100_NUM_SBOX_IRQ;
- return mic_get_rdmasr_irq(rdmasr_index);
- }
-}
-
-/*
- * mic_card_map - Allocate virtual address for a remote memory region.
- * @mdev: pointer to mic_device instance.
- * @addr: Remote DMA address.
- * @size: Size of the region.
- *
- * Returns: Virtual address backing the remote memory region.
- */
-void __iomem *
-mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size)
-{
- return ioremap(addr, size);
-}
-
-/*
- * mic_card_unmap - Unmap the virtual address for a remote memory region.
- * @mdev: pointer to mic_device instance.
- * @addr: Virtual address for remote memory region.
- *
- * Returns: None.
- */
-void mic_card_unmap(struct mic_device *mdev, void __iomem *addr)
-{
- iounmap(addr);
-}
-
-static inline struct mic_driver *mbdev_to_mdrv(struct mbus_device *mbdev)
-{
- return dev_get_drvdata(mbdev->dev.parent);
-}
-
-static struct mic_irq *
-_mic_request_threaded_irq(struct mbus_device *mbdev,
- irq_handler_t handler, irq_handler_t thread_fn,
- const char *name, void *data, int intr_src)
-{
- int rc = 0;
- unsigned int irq = intr_src;
- unsigned long cookie = irq;
-
- rc = request_threaded_irq(irq, handler, thread_fn, 0, name, data);
- if (rc) {
- dev_err(mbdev_to_mdrv(mbdev)->dev,
- "request_threaded_irq failed rc = %d\n", rc);
- return ERR_PTR(rc);
- }
- return (struct mic_irq *)cookie;
-}
-
-static void _mic_free_irq(struct mbus_device *mbdev,
- struct mic_irq *cookie, void *data)
-{
- unsigned long irq = (unsigned long)cookie;
- free_irq(irq, data);
-}
-
-static void _mic_ack_interrupt(struct mbus_device *mbdev, int num)
-{
- mic_ack_interrupt(&mbdev_to_mdrv(mbdev)->mdev);
-}
-
-static struct mbus_hw_ops mbus_hw_ops = {
- .request_threaded_irq = _mic_request_threaded_irq,
- .free_irq = _mic_free_irq,
- .ack_interrupt = _mic_ack_interrupt,
-};
-
-static int __init mic_probe(struct platform_device *pdev)
-{
- struct mic_driver *mdrv = &g_drv;
- struct mic_device *mdev = &mdrv->mdev;
- int rc = 0;
-
- mdrv->dev = &pdev->dev;
- snprintf(mdrv->name, sizeof(mic_driver_name), mic_driver_name);
-
- /* FIXME: use dma_set_mask_and_coherent() and check result */
- dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
-
- mdev->mmio.pa = MIC_X100_MMIO_BASE;
- mdev->mmio.len = MIC_X100_MMIO_LEN;
- mdev->mmio.va = devm_ioremap(&pdev->dev, MIC_X100_MMIO_BASE,
- MIC_X100_MMIO_LEN);
- if (!mdev->mmio.va) {
- dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
- rc = -EIO;
- goto done;
- }
- mic_hw_intr_init(mdrv);
- platform_set_drvdata(pdev, mdrv);
- mdrv->dma_mbdev = mbus_register_device(mdrv->dev, MBUS_DEV_DMA_MIC,
- NULL, &mbus_hw_ops, 0,
- mdrv->mdev.mmio.va);
- if (IS_ERR(mdrv->dma_mbdev)) {
- rc = PTR_ERR(mdrv->dma_mbdev);
- dev_err(&pdev->dev, "mbus_add_device failed rc %d\n", rc);
- goto done;
- }
- rc = mic_driver_init(mdrv);
- if (rc) {
- dev_err(&pdev->dev, "mic_driver_init failed rc %d\n", rc);
- goto remove_dma;
- }
-done:
- return rc;
-remove_dma:
- mbus_unregister_device(mdrv->dma_mbdev);
- return rc;
-}
-
-static int mic_remove(struct platform_device *pdev)
-{
- struct mic_driver *mdrv = &g_drv;
-
- mic_driver_uninit(mdrv);
- mbus_unregister_device(mdrv->dma_mbdev);
- return 0;
-}
-
-static void mic_platform_shutdown(struct platform_device *pdev)
-{
- mic_remove(pdev);
-}
-
-static struct platform_driver __refdata mic_platform_driver = {
- .probe = mic_probe,
- .remove = mic_remove,
- .shutdown = mic_platform_shutdown,
- .driver = {
- .name = mic_driver_name,
- },
-};
-
-static struct platform_device *mic_platform_dev;
-
-static int __init mic_init(void)
-{
- int ret;
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- if (!(c->x86 == 11 && c->x86_model == 1)) {
- ret = -ENODEV;
- pr_err("%s not running on X100 ret %d\n", __func__, ret);
- goto done;
- }
-
- request_module("mic_x100_dma");
- mic_init_card_debugfs();
-
- mic_platform_dev = platform_device_register_simple(mic_driver_name,
- 0, NULL, 0);
- ret = PTR_ERR_OR_ZERO(mic_platform_dev);
- if (ret) {
- pr_err("platform_device_register_full ret %d\n", ret);
- goto cleanup_debugfs;
- }
- ret = platform_driver_register(&mic_platform_driver);
- if (ret) {
- pr_err("platform_driver_register ret %d\n", ret);
- goto device_unregister;
- }
- return ret;
-
-device_unregister:
- platform_device_unregister(mic_platform_dev);
-cleanup_debugfs:
- mic_exit_card_debugfs();
-done:
- return ret;
-}
-
-static void __exit mic_exit(void)
-{
- platform_driver_unregister(&mic_platform_driver);
- platform_device_unregister(mic_platform_dev);
- mic_exit_card_debugfs();
-}
-
-module_init(mic_init);
-module_exit(mic_exit);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("Intel(R) MIC X100 Card driver");
-MODULE_LICENSE("GPL v2");